John robert weaver



(No Model.)

J.. R. WEAVER. SEWING MACHINE BRAKE.

8 9 Ma 1 8 e m m m A d 0 0 m J m P Mum" JOHN ROBERT WEAVER, OF COMMERCE,TEXAS, ASSIGNOR OF ONE-HALF PATENT I OFFICE.

TO MIKE ST. CLAIR, OF SAME PLACE.

- SEWING-MACHINE BRAKE.

SPECIFICATION. forming part of Letters Patent No. 601 ,692, dated April5, 1898.

Application filed October 4, 1897.

To all whom it may concern.-

Be it known that 1, JOHN ROBERT WEAVER, a citizen of the United States,residing at Oommerce, in'the county of Hunt and State of Texas, haveinvented a'new and useful Sewing-Machine Brake, of which the followingis a specification.

This invention relates to brakes for sewing-- machines designed toprevent retrograde rotary movement of the shaft; and the object of theinvention is to provide a simple and efficient brake mechanism which maybe easily and quickly attached to any ordinary sew-. ing-machine topermit free rotary movement of the shaft in the proper direction andquickly stop a reverse movement.

With this object in view the invention consists of the several detailsof construction, combination, and arrangement of parts, as will behereinafter fully described, and particularly pointed out in the claims.

In the drawings, Figure 1 is a perspective view of a portion of asewing-machine, showingmy invention in position thereon. Fig. 2 is aperspective view of the gravity-dog and its supporting-standarddetached. Fig. 3 is a perspective View of one of the clamps detached.

Similar reference-numerals indicate similar parts in the severalfigures.

1 indicates the table of a sewing-machine, and 2 the hand-wheel, whichis mounted on the shaft 3 in the usual manner.

4 indicates a flat metal ring of substantially the same diameter as thatof the handwheel, and this ring is provided with a series of pins 6,which project outwardly from one of its faces.

7 indicates U-shaped clips adapted to embrace the peripheries of thewheel 2 and ring 1, and each arm of these clips is provided with aperforation 8, that in one arm being for the passage of one of the pins6 and the other being preferably threaded to receive a set-screw 9,adapted to engage the inner face of the hand-wheel 2 in order' to clampthe ring and the hand wheel together. These U- shaped clips form a readyand convenient means for securing the ring 4: to the handwheel; but itis obvious that other means Serial nmleeaeei. (No model.)

might be employed to accomplish this purpose. 10 indicates a standardconsisting of a bar of metal havingone end bent at a right angle to forma foot 11, which latter is perforated for the passage of a screw 12 orother fasteniugdevice, by means of which the standard may be secured tothe machine-table. The upper end of the standard is slotted and bent toform spaced ears 13 to serve as bearings for a pin 14, which is firmlysecured to the gravity-dog intermediate itsends. That portion of the dogbelow the pivot-pin 14 is much heavier than the portion above it, andnormally the dog will be in a vertical position with its lower portionengaging the standard 10, The parts will be so arranged that the upperend of the dog will be in the path of travel of the pins and be engagedthereby when the shaft is rotated. When moving in the proper direction,the pins will rock the dog on its pivot and cause its lower end to moveaway from the standard as its upper end is engaged by the pinssuccessively, and the pins will therefore be enabled to slip over theupper end of the dog. Should, however, the shaft be reversed, one of thepins will engage the upper end of the dog and force the lower end of thedog'against the standard 10 and thereby at once stop. the retrogrademovement of the shaft. p

The device is simple and inexpensive to manufacture and,as will bereadily seen, can be quickly and easily attached to any ordinarysewing-machine at presentin use. While I have described the ring 4 asbeing attached to the hand-wheel, it is obvious that the ring may bemounted directly on the shaft 3 and operate in the same manner. Thelower end of the dog, which comes in contact with the standard, may beprovided with a' cushion of rubber or other suitable material-to preventunnecessary noise, and it is to be understood that changes in the form,proportion, andthe minor details of construction may be resorted towithout departing from the spirit or sacrificing any of the advantagesof this invention.

Having thus described the invention, what I claim is-- 1. In asewing-machine, the combination of a series of pins supported to movewith the shaft and concentric therewith, a vertical standard secured tothe table, and a gravitydog pivoted intermediate its ends to the upperend of the standard, with its upper end lying in the path of travel ofthe pins and its lower end normally engaging the standard, substantiallyas described.

2. In a sewing-machine, the combination with the shaft and thehand-wheel mounted thereon, of a ring secured to the hand-wheel andconcentric to the shaft, a series of pins projecting outwardly from saidring, a verti cal standard secured to the table of the machine, and agravity-dog pivoted intermediate its ends to the upper end of saidstandard,

with its upper end lyingin the path of travel of said pins and its lowerend normally ongaging the standard, substantially as described.

3. In a sewing-machine, the combination with the shaft and thehand-Wheel mounted thereon, of a flat metal ring of substantially thesame diameter as the hand-wheel, a series of pins projecting outwardlyfrom said ring, U-shaped clips adapted to embrace the peripheries of thehand-wheel and the ring, said clips having perforations near each endone of said perforations fitting over one of the pins,and the otherperforation serving as a seat for a set-screw to engage the inner faceof the hand-wheel, a standard secured to the machine-table, and agravity-dog pivoted to said standard with its upper end lying in thepath of travel of said pins, substantially as described.

In testimony that I claim the foregoing as my ownI have hereto affixedmy signature in the presence of two witnesses.

, JOHN ROBERT WEAVER.

Witnesses: 1

W. W. RUTLAND, H. C. BARKER.

